Chuck



FIG. 1 is a perspective view of a chuck showing my new design;

FIG. 2 is a left side plan elevation view with the chuck shown rotated from the position shown in FIG. 1 thereof;

FIG. 3 is a right side plan elevation view thereof;

FIG. 4 is a front plan elevation thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a bottom view thereof.

The tool outlined by the dashed lines in FIGS. 1-6 is included to illustrate an associated use and forms no part of the claimed invention. 

The ornamental design for a chuck, as shown and described. 